Dd hurt at school - how should this be handled?

Today dd was stabbed in leg with compass at school, I believe along with at least one other girl.

History with the boy who done it is - last few weeks dd has been coming home saying how he punched her in back, stabbed pen into her head etc, I have since learnt today that apparently he also carries knifes, drugs and large sums of cash in his bag.

So far statements have been taken by few people and he was placed in isolation for day, I was asked to pick dd up early so she wouldn't bump into him at end of day coming out of school.

Since then lots of texts asking if dd refitted as he's going mad and will hurt her bad etc.

Dd is obviously petrified of going to school now and along with issues we been having with her learning and struggles since starting this school year this is really the last thing she needs

What should I be expecting from the school with how this should be handled ?

Also, that's a safeguarding issue - clearly the school were aware of it previously and have not done what they should to keep your daughter safe. I would be flagging this up to Local authority, head teacher, police. Massive alarm bells ringing here.

School should, at the minimum, come up with a detailed, written plan as to how they will keep your daughter safe when at school. Should include how she won't have contact with said Boy, what they will be doing to keep him away from others he could cause a danger to. Risk assessments. Personal, detailed information on a lesson-by-lesson basis that will reassure your daughter and make the learning environment safe for her.

Another saying police. I'm a secondary school teacher and IME schools are usually crap at dealing with serious stuff. They have a conflict of interest because they have responsibilities towards the violent child too. Police have no such issues.

That sounds awful, your poor Dd. I'd agree with involving the police but do have your her medically checked out. If the compass broke the skin and also the skin of another person the possibility of blood born diseases ought to be considered. It's a very small chance, so I really don't want to panic you but it should be considered by someone who can ideally take into account the medical history of both parties.